8.
Proximity Capacitor Model C = the capacitance in farads (F) A = the area of the plates in square meters (m2) d = the distance between the plates in meters (m) k = the dielectric constant of the material separating the plates ε 0= is the permittivity of free space (8.85 x 10-12 F/m)

9.
Capacitive Sensing <ul><li>E-Field devices produce a voltage inversely proportional to the change in electrode capacitance </li></ul><ul><li>E-Field device has no memory or intelligence inside </li></ul><ul><li>Capacitive sensors respond to a change in physical stimulus </li></ul><ul><li>Used in many areas of automotive, industrial and consumer </li></ul><ul><li>Most popular application today is a capacitive touch sensing </li></ul><ul><li>Enables the elimination of mechanical buttons and sliders </li></ul><ul><li>Provide immunity to mechanical wear and tear </li></ul><ul><li>Gives greater flexibility for product designers </li></ul><ul><li>Reduction of BOM costs </li></ul>Proximity Capacitive Sensing E-Field